She didn't call him a liar though, she just said that what he's reporting isn't true. Honestly, the people getting worked about her are showing a pretty troubling attitude.
https://www.premierleague.com/news/4323529
Looks like Heath and Barnsley have already signed their contract extensions.
Edit: Also looks like Onyango must have extended his contract at some point too. Pretty sure his was meant to expire this...